WO2017159253A1 - 硬化性樹脂組成物および光学部材 - Google Patents
硬化性樹脂組成物および光学部材 Download PDFInfo
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- WO2017159253A1 WO2017159253A1 PCT/JP2017/006603 JP2017006603W WO2017159253A1 WO 2017159253 A1 WO2017159253 A1 WO 2017159253A1 JP 2017006603 W JP2017006603 W JP 2017006603W WO 2017159253 A1 WO2017159253 A1 WO 2017159253A1
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/066—Copolymers with monomers not covered by C08L33/06 containing -OH groups
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/009—Additives being defined by their hardness
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- the present invention relates to a curable resin composition composited with an inorganic material, and an optical member having a cured resin portion formed from such a composition.
- plastic materials and resin materials having excellent transparency and high scratch resistance have been demanded in various applications.
- various anti-reflection films, refractive index adjusting films, and hard coat layers for various camera lenses, spectacle lens surface films, and various optical members.
- resin materials composite materials in which zirconia fine particles and titanium oxide fine particles are dispersed have been developed (for example, Patent Documents 1 and 2 below).
- nanodiamonds As for nanodiamonds, so-called single-digit nanodiamonds having a particle size of 10 nm or less may be required depending on applications.
- the technology relating to such nanodiamonds is described in, for example, Patent Documents 3 and 4 below.
- Nanodiamonds can exhibit high mechanical strength, high refractive index, etc., as do bulk diamonds. Nanoparticles, which are fine particles, generally have a large proportion of surface atoms (coordinately unsaturated). Therefore, the sum of van der Waals forces that can act between surface atoms of adjacent particles is large, causing aggregation. Prone to occur. In addition to this, in the case of nanodiamond particles, a phenomenon called agglutination can be generated in which coulomb interaction between crystal planes of adjacent crystallites contributes and is very strongly assembled.
- nanodiamond particles have such unique properties that crystallites or primary particles can interact in a superimposed manner, it is technically difficult to create a state in which nanodiamond particles are dispersed in a resin material. Accompanied by. Such low dispersibility in nanodiamond particles is a factor in the low degree of design freedom of composite materials containing nanodiamond particles, particularly in the case of combining organic materials and nanodiamonds. May be an obstacle.
- the present invention has been conceived under such circumstances, and is a curable resin composition suitable for forming a nanodiamond dispersed cured resin portion having high transparency and high scratch resistance.
- the purpose is to provide.
- Another object of the present invention is to provide an optical member having such a cured resin portion.
- a curable resin composition contains a component for forming a cured resin (curable resin component), a surface-modified nanodiamond, and an organic solvent.
- the surface-modified nanodiamond includes nanodiamond particles and a silane coupling agent having an organic chain containing a (meth) acryloyl group and bonded to the nanodiamond particles.
- the present curable resin composition is a material for forming a light-transmitting cured resin portion or cured resin film, for example, by being applied on a predetermined substrate and then dried and cured.
- the curable resin component is a component that can form a curable resin, and includes, for example, a curable monomer and / or oligomer that causes a polymerization reaction to proceed by light irradiation or heating.
- the nanodiamond particles of the surface modified nanodiamond may be primary particles of nanodiamond or secondary particles of nanodiamond.
- the nanodiamond primary particles are nanodiamonds having a particle diameter of 10 nm or less.
- a silane coupling agent is an organosilicon compound having both a reactive group containing silicon and an organic chain bonded to silicon, which will cause chemical bonding with an inorganic material.
- the silane coupling agent of the surface-modified nanodiamond in the invention is bonded to the particle by forming a covalent bond with the surface of the nanodiamond particle at the reactive group.
- the (meth) acryloyl group means an acryloyl group and / or a methacryloyl group.
- the surface-modified nanodiamond binds the silane coupling agent having an organic chain containing a (meth) acryloyl group to the nanodiamond particle through a covalent bond as described above.
- the (meth) acryloyl group-containing organic chain in the silane coupling agent is located on the side of the interface with the periphery of the surface-modified nanodiamond. Nanodiamond particles with surface modification in this manner have a higher affinity for organic materials than nanodiamond particles without surface modification. Therefore, the surface-modified nanodiamond is suitable for realizing high dispersion stability in the present curable resin composition containing a curable resin component and an organic solvent in addition thereto.
- a (meth) acryloyl group that is a polymerizable group is present in the organic chain located at the interface with the periphery.
- the (meth) acryloyl group of the surface-modified nanodiamond can be copolymerized with the curable resin component, and in the cured resin portion or cured resin film to be formed, Surface-modified nanodiamonds or nanodiamond particles are incorporated into the matrix of the cured resin.
- the surface-modified nanodiamond suitable for realizing high dispersion stability in the present curable resin composition is suitable for incorporating the nanodiamond particles while being dispersed in the cured resin matrix. That is, the structure in which a (meth) acryloyl group which is a polymerizable group is present on the surface of a surface-modified nanodiamond suitable for realizing high dispersion stability in the present curable resin composition is a cured resin and its matrix. It is suitable for forming a nanocomposite material containing nanodiamond particles dispersed therein from the curable resin composition.
- the nano-diamond particles which are diamond particles having extremely high mechanical strength, are dispersed in the cured resin matrix. Suitable for realizing high scratch resistance as well as high transparency in the part or cured resin film.
- the present curable resin composition is suitable for forming a nanodiamond dispersion-cured resin portion having high transparency and high scratch resistance.
- the nanodiamond particles are nanodiamond particles generated by detonation (detonation nanodiamond particles).
- the primary particle diameter of detonation nanodiamond particles is single-digit nanometers, and such a configuration is suitable for realizing high transparency for the cured resin portion formed from the present curable resin composition. is there.
- the particle diameter D50 (median diameter) of the surface-modified nanodiamond is preferably 50 nm or less, more preferably 30 nm or less, and more preferably 20 nm or less. Such a configuration is suitable for achieving high transparency for the cured resin portion formed from the present curable resin composition.
- the organic chain of the silane coupling agent in the surface-modified nanodiamond is propyl acrylate and / or propyl methacrylate.
- Such a configuration is suitable for achieving high transparency and high scratch resistance for the cured resin portion formed from the present curable resin composition.
- the curable resin component has a (meth) acryloyl group. More preferably, the curable resin component comprises pentaerythritol triacrylate, pentaerythritol tetraacrylate, an oligomer of pentaerythritol triacrylate, an oligomer of pentaerythritol tetraacrylate, and an oligomer of pentaerythritol triacrylate and pentaerythritol tetraacrylate. It is at least one selected from the group.
- the present curable resin composition it is easy to stabilize the dispersion of the surface-modified nanodiamond having a (meth) acryloyl group in the surface organic chain. Further, according to this configuration, in the process of polymerization of the curable resin component in the curable resin composition, it is easy to copolymerize the (meth) acryloyl group in the surface organic chain of the surface-modified nanodiamond with the curable resin component. .
- the ratio of the curable resin component in the solid content (containing solid content) contained in the present curable resin composition is sufficient for the characteristics of the cured resin in the cured resin part formed from the present curable resin composition depending on its application. From the standpoint of expressing the content of the polymer, it is preferably 30% by mass or more, more preferably 40% by mass or more, more preferably 55% by mass or more, and more preferably 60% by mass or more.
- the curability in the solid content contained in the present curable resin composition is preferably 99.9% by mass or less, more preferably 99% by mass or less, and more preferably 95% by mass or more.
- the organic solvent includes tetrahydrofuran.
- tetrahydrofuran tetrahydrofuran
- the curable resin composition according to the first aspect of the present invention preferably contains zirconium having a ratio in the total content with the surface-modified nanodiamond of 0.01% by mass or more. According to such a configuration, it is considered that in the present curable resin composition, it is easy to stabilize the dispersion of the surface-modified nanodiamond.
- the curable resin composition according to the first aspect of the present invention preferably further contains hollow silica particles.
- the particle diameter of the hollow silica particles in the present curable resin composition is preferably 1 nm or more, and preferably 1000 nm or less, more preferably 500 nm or less, and more preferably 300 nm or less.
- the content ratio of the hollow silica particles in the curable resin composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, and more preferably 2% by mass or more.
- the content rate of the hollow silica particle in this curable resin composition becomes like this.
- it is 90 mass% or less, More preferably, it is 80 mass% or less, More preferably, it is 60 mass% or less.
- an optical member has a cured product of the curable resin composition according to the first aspect of the present invention in at least a part of the light transmission region.
- the present optical member is suitable for realizing an optical member having a cured resin portion or a cured resin film having high transparency and high scratch resistance.
- This optical member has a laminated structure part containing a base material and the said hardened
- the haze of the laminated structure portion is preferably 2.0% or less, more preferably 1.0% or less.
- the haze is a value measured according to JIS K 7136.
- FIG. 1 is an enlarged schematic view of a resin composition X which is a curable resin composition according to an embodiment of the present invention.
- Resin composition X contains curable resin component 10, surface-modified nanodiamond 20, and dispersion medium 30. Further, the resin composition X is a material for forming a light-transmitting cured resin film or cured resin portion by, for example, being applied on a predetermined substrate and then dried and cured.
- the curable resin component 10 contained in the resin composition X is for forming a cured resin part or a cured resin as a main material of the cured resin film formed from the resin composition X.
- the curable resin component 10 is a monomer and / or oligomer for forming a curable acrylic resin by causing a polymerization reaction to proceed by light irradiation or heating.
- a polyfunctional (meth) acrylate having a plurality of (meth) acryloyl groups can be used as the monomer for forming the curable resin component 10 and the monomer for forming the curable resin component 10 oligomer.
- “(Meth) acryloyl group” means an acryloyl group and / or a methacryloyl group.
- “(Meth) acrylate” means acrylate and / or methacrylate.
- Examples of the polyfunctional (meth) acrylate include bifunctional (meth) acrylate, trifunctional (meth) acrylate, and polyfunctional (meth) acrylate having 4 or more functionalities.
- bifunctional (meth) acrylate examples include dipropylene glycol di (meth) acrylate, 1,6-hexynesandiol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, PO-modified neopentyl glycol di (meth) acrylate, EO-modified bisphenol A di (meth) acrylate, EO-modified bisphenol F di (meth) acrylate, EO-modified isocyanuric acid di (meth) acrylate, and tricyclodecane dimethanol di (meth) ) Acrylate.
- trifunctional (meth) acrylates include pentaerythritol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethoxytri (meth) acrylate, trimethylolpropane propoxytri (meth) acrylate, and glycerin propoxy.
- examples include tri (meth) acrylate and EO-modified isocyanuric acid tri (meth) acrylate.
- Examples of tetrafunctional or higher polyfunctional (meth) acrylates include pentaerythritol ethoxytetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, And dipentaerythritol hexa (meth) acrylate.
- EO modified means a compound having a poly (oxyethylene) chain.
- PO-modified means a compound having a poly (oxypropylene) chain.
- one kind of polyfunctional (meth) acrylate may be used, or two or more kinds of polyfunctional (meth) acrylates may be used. May be used.
- the curable resin component 10 is preferably It is at least one selected from the group consisting of pentaerythritol triacrylate, pentaerythritol tetraacrylate, an oligomer of pentaerythritol triacrylate, an oligomer of pentaerythritol tetraacrylate, and an oligomer of pentaerythritol triacrylate and pentaerythritol tetraacrylate.
- the curable resin component 10 may include a monofunctional (meth) acrylate having one (meth) acryloyl group in the form of a monomer or in the form of an intra-oligomer monomer unit in addition to the polyfunctional (meth) acrylate.
- monofunctional (meth) acrylates include ⁇ -carboxyethyl (meth) acrylate, isobornyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, EO-modified phenol (meth) acrylate, and EO-modified noniphenol. (Meth) acrylate, and EO-modified 2-ethylhexyl (meth) acrylate.
- the monofunctional (meth) acrylate for the curable resin component 10 one type of monofunctional (meth) acrylate may be used, or two or more types of monofunctional (meth) acrylates may be used.
- the proportion of the monofunctional (meth) acrylate in the form of monomer or in the form of monomer units in the oligomer is, for example, 50% by mass or less, preferably 30% by mass. Hereinafter, it is more preferably 20% by mass or less.
- the curable resin component 10 may contain urethane (meth) acrylate or polyester (meth) acrylate in addition to the above-described polyfunctional (meth) acrylate in the form of a monomer or in the form of an intra-oligomer monomer unit.
- the ratio of the curable resin component 10 as described above in the solid content contained in the resin composition X is preferably 30% by mass or more, more preferably 40% by mass or more, more preferably 55% by mass or more, more preferably 60%. It is at least mass%. Moreover, the ratio of the curable resin component 10 in the solid content contained in the resin composition X is preferably 99.9% by mass or less, more preferably 99% by mass or less, and more preferably 95% by mass or less.
- the resin composition X contains a photopolymerization initiator.
- the photopolymerization initiator include benzoin ether photopolymerization initiator, acetophenone photopolymerization initiator, ⁇ -ketol photopolymerization initiator, aromatic sulfonyl chloride photopolymerization initiator, and photoactive oxime photopolymerization initiator.
- benzoin photopolymerization initiators benzyl photopolymerization initiators, benzophenone photopolymerization initiators, ketal photopolymerization initiators, and thioxanthone photopolymerization initiators.
- benzoin ether photopolymerization initiator examples include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and 2,2-dimethoxy-1,2-diphenylethane-1-one. Can be mentioned.
- Examples of the acetophenone-based photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 4-phenoxydichloroacetophenone, and 4- (t-butyl). ) Dichloroacetophenone.
- Examples of the ⁇ -ketol photopolymerization initiator include 2-methyl-2-hydroxypropiophenone and 1- [4- (2-hydroxyethyl) phenyl] -2-methylpropan-1-one.
- Examples of the aromatic sulfonyl chloride photopolymerization initiator include 2-naphthalenesulfonyl chloride.
- Examples of the photoactive oxime photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime.
- Examples of the benzoin photopolymerization initiator include benzoin.
- Examples of the benzyl photopolymerization initiator include benzyl.
- Examples of the benzophenone photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3′-dimethyl-4-methoxybenzophenone, and polyvinylbenzophenone.
- Examples of the ketal photopolymerization initiator include benzyl dimethyl ketal.
- Examples of the thioxanthone photopolymerization initiator include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone.
- the content of the photopolymerization initiator in the resin composition X is, for example, 0.1 to 10 parts by mass with respect to the total amount (100 parts by mass) of the curable resin component 10.
- the resin composition X contains a thermal polymerization initiator.
- the thermal polymerization initiator include an azo polymerization initiator, a peroxide polymerization initiator, and a redox polymerization initiator.
- the azo polymerization initiator include 2,2′-azobisisobutyronitrile, 2,2′-azobis-2-methylbutyronitrile, and 2,2′-azobis (2-methylpropionic acid) dimethyl. And 4,4′-azobis-4-cyanovaleric acid.
- peroxide polymerization initiator examples include dibenzoyl peroxide and tert-butyl permaleate.
- the content of the thermal polymerization initiator in the resin composition X is, for example, 0.1 to 10 parts by mass with respect to the total amount (100 parts by mass) of the curable resin component 10.
- the surface-modified nanodiamond 20 contained in the resin composition X includes ND particles 21 which are nanodiamond fine particles and a silane coupling agent 22 bonded thereto.
- ND particles 21 in the surface-modified nanodiamond 20 may be primary particles of nanodiamond or secondary particles of nanodiamond.
- the configuration in which the ND particles 21 are primary particles smaller than the secondary particles is suitable for realizing high transparency for the cured resin portion or the cured resin film formed from the resin composition X.
- the ND particles 21 are preferably nanodiamond particles (detonation nanodiamond particles) generated by detonation as described later.
- the primary particle diameter of detonation nanodiamond particles is single-digit nanometers, and such a configuration is suitable for realizing high transparency for the cured resin portion formed from the resin composition X.
- the particle size D50 (median diameter) of the ND particles 21 is, for example, 1 to 100 nm.
- the upper limit of the particle size D50 is preferably 40 nm, more preferably 20 nm, and more preferably 10 nm.
- the particle diameter D50 of the fine particles is a value measured by a so-called dynamic light scattering method.
- the silane coupling agent 22 in the surface modified nanodiamond 20 is bonded to the ND particle 21.
- a silane coupling agent is an organosilicon compound having both a reactive group containing silicon and an organic chain bonded to the silicon, which causes chemical bonding with an inorganic material.
- the coupling agent 22 is bonded to the ND particle 21 by forming a covalent bond with the surface of the ND particle 21 at the reactive group.
- Examples of the reactive group of the silane coupling agent that forms the silane coupling agent 22 bonded to the ND particle 21 include a silanol group (—SOH) and a hydrolyzable group capable of generating a silanol group. .
- hydrolyzable groups examples include alkoxysilyl groups such as methoxy and ethoxy groups bonded to silicon, halosilyl groups such as chlorine and bromine bonded to silicon, and acetoxy bonded to silicon. Groups. These hydrolyzable groups can generate silanol groups via a hydrolysis reaction. A chemical bond may be generated between the silane coupling agent and the ND particle 21 surface through a dehydration condensation reaction between the silanol group of the silane coupling agent and, for example, a hydroxyl group on the surface of the ND particle 21.
- the silane coupling agent 22 in the surface-modified nanodiamond 20 contains a (meth) acryloyl group in its organic chain.
- the (meth) acryloyl group means an acryloyl group and / or a methacryloyl group.
- Preferred examples of the (meth) acryloyl group-containing organic chain in the silane coupling agent 22 include propyl acrylate and propyl methacrylate. According to such a configuration, in the resin composition X, it is easy to stabilize the dispersion of the surface-modified nanodiamond 20 having a (meth) acryloyl group in the surface organic chain.
- the (meth) acryloyl group in the surface organic chain of the surface-modified nanodiamond 20 is combined with the curable resin component 10.
- the silane coupling agent for forming the silane coupling agent 22 include 3- (trimethoxysilyl) propyl acrylate, 3- (trimethoxysilyl) propyl methacrylate, and 3- (methyldimethoxy methacrylate). Silyl) propyl, 3- (methyldiethoxysilyl) propyl methacrylate, and 3- (triethoxysilyl) propyl methacrylate.
- the particle diameter D50 (median diameter) of the surface-modified nanodiamond 20 including the ND particles 21 and the silane coupling agent 22 as described above is, for example, 10 to 120 nm.
- the upper limit of the particle size D50 is preferably 50 nm, more preferably 30 nm, and more preferably 20 nm.
- the content ratio of the surface-modified nanodiamond 20 in the resin composition X is, for example, 0.01 to 60% by mass.
- the content ratio of the surface-modified nanodiamond 20 in the resin composition X is preferably 0.1% by mass. As mentioned above, More preferably, it is 1 mass% or more.
- the ratio of the surface-modified nanodiamond 20 in the solid content included in the resin composition X is, for example, 0.05 to 70% by mass.
- the dispersion medium 30 is a medium for appropriately dispersing the curable resin component 10 and the surface-modified nanodiamond 20 in the resin composition X.
- the dispersion medium 30 is an organic dispersion medium containing 50% by mass or more of an organic solvent.
- the organic solvent include tetrahydrofuran, acetone, methyl ethyl ketone, 1-methoxypropanol, methyl isobutyl ketone, isopropanol, and 2-butanol.
- one type of organic solvent may be used, or two or more types of organic solvents may be used.
- the dispersion medium 30 preferably contains tetrahydrofuran. According to such a configuration, it is easy to stabilize the dispersion of the surface-modified nanodiamond 20 in the resin composition X.
- Resin composition X may further contain hollow silica particles. Such a configuration is suitable for exhibiting antireflection properties in the cured resin portion formed from the resin composition X.
- the particle diameter of the hollow silica particles is preferably 1 to 1000 nm, more preferably 1 to 500 nm, and more preferably 1 to 300 nm.
- the lower limit of the content ratio is preferably 0.5% by mass, more preferably 1% by mass, more preferably 2% by mass.
- the upper limit is preferably 90% by mass, more preferably 80% by mass, and more preferably 60% by mass.
- Resin composition X may contain other components in addition to the above components.
- other components include an antifoaming agent, a leveling agent, a fluorine antifouling additive, and a silicone antifouling additive.
- an antifoaming agent e.g., an antifoaming agent, a leveling agent, a fluorine antifouling additive, and a silicone antifouling additive.
- slipperiness tends to develop in the cured resin portion formed from the resin composition X.
- the expression of slipping contributes to realizing high scratch resistance.
- Examples of such commercially available fluorine-based antifouling additives include “OPTOOL” manufactured by Daikin Industries, Ltd., “KY-1200” series manufactured by Shin-Etsu Chemical Co., Ltd., and “Mega Fuck” manufactured by DIC Corporation. And “F-Clear” manufactured by Kanto Denka Kogyo Co., Ltd.
- FIG. 2 is a process diagram showing an example of a method for producing the surface-modified nanodiamond 20 contained in the resin composition X.
- the method includes a production step S1, a purification step S2, a pH adjustment step S3, a drying step S4, and a modification step S5.
- detonation is performed to produce nanodiamonds.
- a molded explosive with an electric detonator inside a pressure-resistant container for detonation, and keep the container in a state where atmospheric pressure gas and atmospheric explosive coexist in the container.
- the container is made of, for example, iron, and the volume of the container is, for example, 0.5 to 40 m 3 .
- the explosive a mixture of trinitrotoluene (TNT) and cyclotrimethylenetrinitroamine, ie hexogen (RDX), can be used.
- TNT / RDX cyclotrimethylenetrinitroamine
- the mass ratio of TNT to RDX (TNT / RDX) is, for example, in the range of 40/60 to 60/40.
- the amount of explosive used is, for example, 0.05 to 2.0 kg.
- the electric detonator is detonated, and the explosive is detonated in the container.
- Detonation refers to an explosion associated with a chemical reaction in which the reaction flame surface moves at a speed exceeding the speed of sound.
- the diamond used is generated by the action of the pressure and energy of the shock wave generated by the explosion, using the carbon that is liberated due to partial incomplete combustion of the explosive used.
- Nanodiamond is a product obtained by the detonation method.
- the temperature of the container and the inside thereof is lowered by, for example, standing for 24 hours at room temperature.
- the nano-diamond crude product (including the nano-diamond particle aggregates and soot generated as described above) adhering to the inner wall of the container is scraped off with a spatula, The crude product is recovered.
- a crude product of nanodiamond particles can be obtained by the detonation method as described above.
- the purification step S2 includes an acid treatment in which a strong acid is allowed to act on a raw nanodiamond product as a raw material in, for example, an aqueous solvent.
- the nano-diamond crude product obtained by the detonation method is likely to contain a metal oxide.
- This metal oxide is an oxide such as Fe, Co, Ni, etc. derived from the container used for the detonation method. is there.
- the metal oxide can be dissolved and removed from the nanodiamond crude product (acid treatment).
- the strong acid used for this acid treatment is preferably a mineral acid, and examples thereof include hydrochloric acid, hydrofluoric acid, sulfuric acid, nitric acid, and aqua regia.
- one type of strong acid may be used, or two or more types of strong acid may be used.
- the concentration of the strong acid used in the acid treatment is, for example, 1 to 50% by mass.
- the acid treatment temperature is, for example, 70 to 150 ° C.
- the acid treatment time is, for example, 0.1 to 24 hours.
- the acid treatment can be performed under reduced pressure, normal pressure, or increased pressure. After such an acid treatment, the solid content (including the nanodiamond adherend) is washed with water, for example, by decantation. It is preferable to repeat the washing of the solid content by decantation until the pH of the precipitation solution reaches, for example, 2 to 3.
- the purification step S2 includes an oxidation treatment for removing graphite from the nanodiamond crude product (the nanodiamond aggregate before completion of purification) using an oxidizing agent.
- the nano-diamond crude product obtained by the detonation method contains graphite (graphite). This graphite partially forms incomplete combustion of the explosive used to form nano-diamond crystals from the liberated carbon. Derived from carbon that did not.
- graphite can be removed from the nanodiamond crude product (oxidation treatment) by applying a predetermined oxidizing agent in an aqueous solvent, for example.
- Examples of the oxidizing agent used in this oxidation treatment include chromic acid, chromic anhydride, dichromic acid, permanganic acid, perchloric acid, and salts thereof.
- one kind of oxidizing agent may be used, or two or more kinds of oxidizing agents may be used.
- the concentration of the oxidizing agent used in the oxidation treatment is, for example, 3 to 50% by mass.
- the amount of the oxidizing agent used in the oxidation treatment is, for example, 300 to 500 parts by mass with respect to 100 parts by mass of the nanodiamond crude product subjected to the oxidation treatment.
- the oxidation treatment temperature is, for example, 100 to 200 ° C.
- the oxidation treatment time is, for example, 1 to 24 hours.
- the oxidation treatment can be performed under reduced pressure, normal pressure, or increased pressure. Further, the oxidation treatment is preferably performed in the presence of a mineral acid from the viewpoint of improving the removal efficiency of graphite.
- the mineral acid include hydrochloric acid, hydrofluoric acid, sulfuric acid, nitric acid, and aqua regia.
- the concentration of the mineral acid is, for example, 5 to 80% by mass.
- the supernatant liquid at the beginning of water washing is colored, it is preferable to repeat the water washing of the solid content until the supernatant liquid becomes transparent visually.
- impurities such as NaCl
- a low electrolyte concentration is suitable for realizing high dispersibility and high dispersion stability for the nanodiamond particles obtained by this method.
- the nanodiamond may be treated with an alkaline solution.
- an acidic functional group for example, a carboxy group
- a salt for example, a carboxylate
- the alkaline solution used include an aqueous sodium hydroxide solution.
- the alkali solution concentration is, for example, 1 to 50% by weight
- the treatment temperature is, for example, 70 to 150 ° C.
- the treatment time is, for example, 0.1 to 24 hours.
- the nanodiamond may be treated with an acid solution.
- the acid treatment By passing through the acid treatment, it is possible to return the salt of the acidic functional group on the nanodiamond surface back to the free acidic functional group.
- the acid solution used include hydrochloric acid.
- the acid treatment may be performed at room temperature or under heating.
- solid content including nanodiamond adherends
- the pH adjustment step S3 is a step for adjusting the pH of the solution containing the nanodiamond aggregate that has undergone the purification step S2 described above to a predetermined pH before the drying step S4 described later.
- a suspension is obtained, and then acid or alkali is added to the suspension.
- acid or alkali can be used as the alkali.
- the pH of the suspension is adjusted to preferably 8 to 12, more preferably 9 to 11.
- drying process S4 is performed.
- the liquid component is evaporated from the above solution obtained through the pH adjustment step S3 using an evaporator, and then the residual solid content generated thereby is dried by heat drying in a drying oven.
- the heating and drying temperature is, for example, 40 to 150 ° C.
- the modification step S5 is then performed.
- the modification step S5 is a step for modifying the surface of the nanodiamond particles contained in the nanodiamond aggregate obtained as described above, for example, by binding a predetermined silane coupling agent.
- a mixed solution containing dried nanodiamond (nanodiamond aggregate) obtained as described above, a silane coupling agent, and a solvent is stirred in a reaction vessel.
- zirconia beads as a crushing medium are added to the mixed solution in the reaction vessel.
- the diameter of the zirconia beads is, for example, 15 to 500 ⁇ m.
- modification processing is performed on the nanodiamond in the solution using an ultrasonic generator including a vibrator that can oscillate ultrasonic waves.
- the tip of the vibrator of the ultrasonic generator is inserted into the reaction vessel and immersed in the solution, and ultrasonic waves are generated from the vibrator.
- This modification treatment is preferably performed while cooling the solution to be treated with, for example, ice water.
- the treatment time for this modification treatment is, for example, 4 to 10 hours.
- the content of nanodiamond is, for example, 0.5-5% by mass
- the concentration of the silane coupling agent is, for example, 5-40% by mass.
- the solvent for example, tetrahydrofuran, acetone, methyl ethyl ketone, 1-methoxypropanol, methyl isobutyl ketone, isopropanol, or 2-butanol is used.
- the ratio (mass ratio) of nanodiamond and silane coupling agent in the solution is, for example, 2: 1 to 1:10.
- cavitation occurs in the solution subjected to ultrasonic irradiation based on the acoustic effect, and the zirconia beads in the solution acquire extremely large kinetic energy by the jet jet generated when the microbubbles collapse in the cavitation.
- the ring agent acts to bind.
- This bond is, for example, a covalent bond generated through a dehydration condensation reaction between a silanol group on the silane coupling agent side and a surface hydroxyl group on the nanodiamond particle side.
- the silane coupling agent has a hydrolyzable group, a silanol group can be generated from the hydrolyzable group even by a slight amount of water contained in the reaction system.
- the surface-modified nanodiamond 20 including the ND particles 21 and the silane coupling agent 22 bonded thereto can be produced. If unreacted nanodiamond aggregate is present in the solution that has undergone this step, the supernatant liquid is collected after the solution is allowed to stand to reduce the content of unreacted nanodiamond aggregate. A surface-modified nanodiamond dispersion liquid can be obtained. In addition, for the surface-modified nanodiamond dispersion liquid, a solvent replacement operation for changing the solvent used in the modification step S5 to another solvent may be performed.
- Resin composition X can be produced, for example, using surface-modified nanodiamond 20 produced as described above. Specifically, for example, the surface-modified nanodiamond dispersion liquid (containing the surface-modified nanodiamond 20) obtained as described above, the curable resin component 10 separately prepared, the dispersion medium 30, and, if necessary, And other components such as a polymerization initiator added.
- the resin composition X containing at least the curable resin component 10, the surface-modified nanodiamond 20, and the dispersion medium 30 can be produced. Then, a cured resin portion or a cured resin film can be formed from such a resin composition X. In the formation of the cured resin portion, for example, the resin composition X is applied on the base material, and the dispersion medium 30 is evaporated from the resin composition X on the base material by heating or the like, and then by light irradiation or heating or the like. The resin composition X on the substrate is cured.
- the surface-modified nanodiamond 20 is a surface-modifying element that binds the silane coupling agent 22 having an organic chain containing a (meth) acryloyl group to the ND particle 21 through a covalent bond as described above.
- the (meth) acryloyl group-containing organic chain in the silane coupling agent 22 is located on the side of the interface with the periphery of the surface-modified nanodiamond 20.
- the ND particles 21 with surface modification in such a manner have higher affinity for organic materials than nanodiamond particles without surface modification. Therefore, the surface-modified nanodiamond 20 is suitable for realizing high dispersion stability in the resin composition X containing the curable resin component 10 and the organic solvent in addition thereto.
- a (meth) acryloyl group that is a polymerizable group is present in the organic chain located at the interface with the periphery.
- the (meth) acryloyl group of the surface-modified nanodiamond 20 can be copolymerized with the curable resin component 10 to form a cured resin portion or a cured resin.
- the surface-modified nanodiamond 20 or the ND particles 21 are taken into the matrix of the cured resin.
- the surface-modified nanodiamond 20 suitable for achieving high dispersion stability in the resin composition X is suitable for incorporating the ND particles 21 while dispersing them in the cured resin matrix. That is, the configuration in which a (meth) acryloyl group that is a polymerizable group is present on the surface of the surface-modified nanodiamond 20 suitable for realizing high dispersion stability in the resin composition X is achieved by the cured resin and its matrix. It is suitable for forming a nanocomposite material including the ND particles 21 dispersed in the resin composition X.
- the configuration in which the ND particles 21 which are diamond fine particles having extremely high mechanical strength are dispersed in the cured resin matrix has the following configuration. It is suitable for realizing high scratch resistance as well as high transparency in the cured resin film.
- the resin composition X is suitable for forming a nanodiamond dispersion-cured resin portion having high transparency and high scratch resistance.
- the resin composition X preferably contains zirconium having a ratio in the total content with the surface-modified nanodiamond 20 of 0.01% by mass or more. According to such a configuration, it is considered that dispersion stabilization of the surface-modified nanodiamond 20 is easily achieved in the resin composition X.
- FIG. 3 is a partial cross-sectional view of an optical member Y according to another embodiment of the present invention.
- the optical member Y includes a transparent substrate 40 and a cured resin film X ′ that is a nanodiamond dispersion cured resin film.
- the optical member Y is an optical member that transmits light, such as a transparent substrate for a flat panel display such as a liquid crystal display, an organic electroluminescence display, and a plasma display, a lens, and a transparent panel for a touch panel.
- the transparent substrate 40 is a transparent member that is a main structural element of the optical member Y, and includes a region through which light is transmitted.
- a transparent substrate 40 is made of, for example, a resin material or a glass material.
- the resin material for the transparent substrate 40 include a cellulose acetate film, a polyester film, a polycarbonate film, and a polynorbornene film.
- the cellulose acetate film include a triacetyl cellulose film, a diacetyl cellulose film, a cellulose acetate propionate film, and a cellulose acetate butyrate film.
- the polyester film include a polyethylene terephthalate film and a polyethylene naphthalate film.
- the haze of the transparent substrate 40 is preferably 2.0% or less, more preferably 1.0% or less.
- the haze is a value measured in accordance with JIS K 7136.
- the thickness of the transparent substrate 40 is preferably 400 ⁇ m or less, more preferably 200 ⁇ m or less.
- the cured resin film X ′ is formed from the resin composition X described above (not shown for the internal structure), and is provided so as to cover at least a part of the light transmission region of the transparent substrate 40. That is, the optical member Y has a portion formed from the resin composition X in at least a part of the light transmission region.
- the thickness of the cured resin film X ′ is, for example, 0.01 to 100 ⁇ m.
- the cured resin film X ′ formed from the resin composition X suitable for forming the cured resin portion having high transparency and high scratch resistance is the outermost layer or hard coat of the multilayer hard coat layer. It can function as a layer.
- the refractive index and / or thickness of the cured resin film X ′ is set in accordance with the refractive index of the transparent substrate 40, for example, so that the cured resin film X ′ is a refractive index adjusting film (index matching film) or It can function as an antireflection film.
- the thickness of the optical member Y is preferably 50 ⁇ m or less from the viewpoint of realizing sufficient light transmission and good bendability. More preferably, it is 20 ⁇ m or less.
- the haze of the laminated structure portion including the transparent base material 40 and the cured resin film X ′ in the optical member Y is preferably 2.0% or less from the viewpoint of realizing sufficient light transmission in the optical member Y. More preferably, it is 1.0% or less.
- Such an optical member Y can be manufactured by applying the resin composition X described above onto the transparent substrate 40 to form a thin film, and then drying and curing.
- the coating means include a bar coater, spray coating, spin coater, dip coater, die coater, comma coater, and gravure coater.
- the optical member Y has a cured resin film X ′ formed from a resin composition X suitable for forming a cured resin portion or a cured resin film having high transparency and high scratch resistance. Therefore, the optical member Y is suitable for realizing an optical member having a cured resin portion or a cured resin film having high transparency and high scratch resistance.
- a molded explosive with an electric detonator is installed inside a pressure-resistant container for detonation, and the atmospheric composition of atmospheric pressure and the explosive used coexist in the container.
- the container was sealed.
- the container is made of iron and the volume of the container is 15 m 3 .
- As the explosive 0.50 kg of a mixture of trinitrotoluene (TNT) and cyclotrimethylenetrinitroamine or hexogen (RDX) was used.
- the mass ratio (TNT / RDX) of TNT and RDX in the explosive is 50/50.
- the electric detonator was detonated, and the explosive was detonated in the container.
- the container and its interior were cooled by being left at room temperature for 24 hours. After this cooling, the nanodiamond crude product (including the nanodiamond particle aggregates and soot produced by the above detonation method) adhering to the inner wall of the container is scraped off with a spatula. The crude product was recovered. The recovered amount of the nanodiamond crude product was 0.025 kg.
- purification process was performed with respect to the nano diamond crude product acquired by performing the above production
- the slurry obtained by adding 6 L of 10 mass% hydrochloric acid to 200 g of the nanodiamond crude product was subjected to a heat treatment for 1 hour under reflux under normal pressure conditions.
- the heating temperature in this acid treatment is 85 to 100 ° C.
- the solid content was washed with water by decantation. The solid content was washed repeatedly with decantation until the pH of the precipitate reached 2 from the low pH side.
- an oxidation treatment in the purification process was performed. Specifically, first, 5 L of 60% by mass sulfuric acid aqueous solution and 2 L of 60% by mass chromic acid aqueous solution were added to the decantated precipitate to form a slurry, and then the slurry was subjected to normal pressure conditions. Heat treatment was performed for 5 hours under reflux. The heating temperature in this oxidation treatment is 120 to 140 ° C. Next, after cooling, the solid content (including the nanodiamond adherend) was washed with water by decantation. The supernatant liquid at the beginning of washing with water was colored, and the washing of the solid content by decantation was repeated until the supernatant liquid became clear visually.
- a pH adjustment step was performed. Specifically, after adding ultrapure water to the precipitate obtained through the above water washing by centrifugal sedimentation method to prepare a suspension with a solid content concentration of 8% by mass, the suspension is added by adding sodium hydroxide. The pH of the liquid was adjusted to 10. In this way, a slurry with adjusted pH was obtained.
- a drying process was performed. Specifically, after evaporating the liquid from the nanodiamond aqueous dispersion obtained in the pH adjustment step using an evaporator, the resulting solid content is dried by heat drying in a drying oven. It was. The heating and drying temperature was 120 ° C.
- a modification process was performed. Specifically, first, 0.15 g of nanodiamond powder obtained through the above-described drying step was weighed into a 50 ml sample bottle, and the nanodiamond powder was subjected to preliminary drying at 150 ° C. for 1 hour. Next, a solution in which the nanodiamond powder, 14 g of tetrahydrofuran (THF) as a solvent, and 1 g of 3- (trimethoxysilyl) propyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.) as a silane coupling agent are mixed. was stirred for 10 minutes.
- THF tetrahydrofuran
- 3- (trimethoxysilyl) propyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- zirconia beads (trade name “DZB ⁇ 30”, representative particle size 20 to 40 ⁇ m, manufactured by Daiken Chemical Industry Co., Ltd.) was added to the solution.
- the above mixed solution was subjected to modification treatment using a homogenizer (trade name “Ultrasonic Disperser UH-600S”, manufactured by SMT Co., Ltd.) as an ultrasonic generator.
- a homogenizer trade name “Ultrasonic Disperser UH-600S”, manufactured by SMT Co., Ltd.
- an ultrasonic wave is generated from the vibrator while the tip of the vibrator of the ultrasonic generator is inserted into the reaction container and immersed in the solution, and the reaction container is cooled with ice water.
- the mixed solution was subjected to ultrasonic treatment or modification treatment for 8 hours.
- the ND dispersion S1 obtained as described above was allowed to stand overnight, and then the supernatant was collected. Next, the supernatant was added dropwise to a mixed solvent of 16 ml of toluene and 4 ml of hexane. The total drop volume of the supernatant is 10 ml. By the dropwise addition, the supernatant liquid which was black and transparent changed to a turbid color in the mixed solvent.
- the mixed solvent after the dropping was subjected to a centrifugal treatment using a centrifuge, and the solid content (surface modified nanodiamond particles) thus precipitated was recovered. In this centrifugation treatment, the centrifugal force was 20000 ⁇ g, and the centrifugation time was 10 minutes.
- the Zr content of the recovered solid content was measured by ICP emission spectrometry described later after drying, and found to be 7.1% by mass.
- ND dispersion S2 ND dispersion except that the silane coupling agent used in the modification step was changed to 1 g of 3- (trimethoxysilyl) propyl methacrylate (manufactured by Tokyo Chemical Industry Co., Ltd.) instead of 3- (trimethoxysilyl) propyl acrylate.
- generation step, purification step, pH adjustment step, drying step, modification step similar to those described above for the production of the liquid S1
- another surface modified nanodiamond dispersion (ND dispersion S2) or surface Modified nanodiamonds were prepared.
- the particle diameter D50 (median diameter) after the modification treatment for 8 hours was measured by a dynamic light scattering method as described later, and it was 19 nm.
- the Zr content of the surface-modified nanodiamond in the ND dispersion S2 was measured in the same manner as the surface-modified nanodiamond in the ND dispersion S1, and found to be 7.5% by mass.
- a PET film having a hard coat on the surface was produced as follows. Specifically, first, 30 parts by weight of urethane acrylate (trade name “KRM8200”, manufactured by Daicel Ornex Co., Ltd.), 70 parts by weight of methyl ethyl ketone, a photopolymerization initiator (trade name “Irgacure 184”), 2 parts by mass of BASF) were mixed in a light-shielding bottle to prepare a hard coat-forming coating material.
- urethane acrylate trade name “KRM8200”, manufactured by Daicel Ornex Co., Ltd.
- methyl ethyl ketone methyl ethyl ketone
- a photopolymerization initiator trade name “Irgacure 184”
- a coating film was formed by casting the hard coat forming coating material on a 75 ⁇ m thick easy-adhesive PET film (trade name “A-4300”, manufactured by Toyobo Co., Ltd.) using a wire bar. Then, the said coating film was dried using the drier for 1 minute at 80 degreeC (The thickness of the coating film after drying is 5 micrometers).
- a UV irradiation device (trade name “ECS-4011GX”, the light source is a high-pressure mercury lamp, manufactured by Eye Graphics Co., Ltd.), the coating film on the PET film was irradiated with UV light in a nitrogen atmosphere. In this ultraviolet irradiation, the light source output was 4 kW, and the conveyance speed of the conveyor for conveying the irradiation object was 4 m / min.
- a hard coat PET film was produced as described above.
- Example 1 The supernatant liquid collected after allowing the ND dispersion S1 to stand for a whole day and night is dropped into a mixed solvent of 16 ml of toluene and 4 ml of hexane (total amount of dripping 10 ml), and the mixed solvent after the dropping is subjected to a centrifugal separation treatment (centrifugal force). A solid content (surface-modified nanodiamond particles) that had been precipitated by 20,000 ⁇ g and centrifugation time of 10 minutes was recovered.
- Tetrahydrofuran is added to the solid content thus recovered to prepare a THF solution (solid content concentration of 3% by mass) of surface-modified nanodiamond, and the ultrasonic treatment apparatus (trade name “ASU-10” is used for the solution.
- the product was subjected to ultrasonic treatment for 10 minutes.
- the particle diameter D50 (median diameter) was measured by a dynamic light scattering method as described later, and it was 17 nm.
- the THF solution after the ultrasonic treatment (containing the surface-modified nanodiamond derived from the ND dispersion S1 and the solid content concentration is 3% by mass) and the antireflection paint (trade name “ELCOM P-5062”, hollow Silica fine particle content, solid content concentration of 3 mass%, manufactured by JGC Catalysts & Chemicals Co., Ltd.
- the mixture was added and mixed for 1 hour using a shaker. In this way, an antireflection coating (in which the surface-modified nanodiamond concentration is about 0.06% by mass) in which the surface-modified nanodiamond derived from the ND dispersion S1 is dispersed was prepared.
- the antireflection paint was cast using a wire bar to form a coating film, and then a dryer was used at 80 ° C. for 1 minute.
- the coating film was dried (the thickness of the coating film after drying was 100 nm).
- a UV irradiation device (trade name “ECS-4011GX”, the light source is a high-pressure mercury lamp, manufactured by iGraphics Co., Ltd.), UV light is applied to the coating film on the hard coat PET film in a nitrogen atmosphere. Irradiated. In this ultraviolet irradiation, the light source output was 4 kW, and the conveyance speed of the conveyor for conveying the irradiation object was 2 m / min.
- the hard coat PET film with an antireflection layer of Example 1 was produced.
- Example 2 Amount of anti-reflective coating (trade name “ELCOM P-5062”, manufactured by JGC Catalysts & Chemicals Co., Ltd.) and THF solution (containing surface-modified nanodiamond derived from ND dispersion S1 and solid content concentration is 3 mass%) As for the ratio, the antireflection paint (surface modified nano-particles) was prepared in the same manner as in Example 1, except that the solid content of the THF solution was changed to 5 parts by mass instead of 2 parts by mass with respect to 100 parts by mass of the antireflection paint. A diamond-coated hard film PET film with an antireflection layer of Example 2 was prepared in the same manner as in Example 1 except that this antireflection paint was used.
- Example 3 The supernatant liquid collected after allowing the above ND dispersion S2 to stand for 24 hours is dropped into a mixed solvent of 16 ml of toluene and 4 ml of hexane (total dripping amount: 10 ml), and the mixed solvent after dropping is centrifuged (centrifugal force). A solid content (surface-modified nanodiamond particles) that had been precipitated by 20,000 ⁇ g and centrifugation time of 10 minutes was recovered.
- Tetrahydrofuran (THF) is added to the solid content thus recovered to prepare a THF solution (solid content concentration of 3% by mass) of surface-modified nanodiamond, and the ultrasonic treatment apparatus (trade name “ASU-10” is used for the solution.
- the product was subjected to ultrasonic treatment for 10 minutes.
- THF solution after this ultrasonic treatment (containing surface-modified nanodiamond derived from ND dispersion S2 and solid content concentration is 3% by mass), antireflection paint (trade name “ELCOM P-5062”, hollow silica fine particles Containing, solid content concentration of 3% by mass, manufactured by JGC Catalysts & Chemicals Co., Ltd.) into a light-shielding bottle at a ratio that the solid content of the THF solution is 5 parts by mass with respect to 100 parts by mass of the solid content of the antireflection paint The mixture was mixed for 1 hour using a shaker.
- antireflection paint trade name “ELCOM P-5062”, hollow silica fine particles Containing, solid content concentration of 3% by mass, manufactured by JGC Catalysts & Chemicals Co., Ltd.
- an antireflective coating material in which the surface-modified nanodiamond derived from the ND dispersion S2 is dispersed (the surface-modified nanodiamond concentration is about 0.15% by mass) was prepared.
- the antireflection paint was cast using a wire bar to form a coating film, and then a dryer was used at 80 ° C. for 1 minute. The coating film was dried (the thickness of the coating film after drying was 100 nm).
- UV irradiation device (trade name “ECS-4011GX”, the light source is a high-pressure mercury lamp, manufactured by iGraphics Co., Ltd.), UV light is applied to the coating film on the hard coat PET film in a nitrogen atmosphere. Irradiated. In this ultraviolet irradiation, the light source output was 4 kW, and the conveyance speed of the conveyor for conveying the irradiation object was 2 m / min. As described above, the hard coat PET film with an antireflection layer of Example 3 was produced.
- ECS-4011GX the light source is a high-pressure mercury lamp, manufactured by iGraphics Co., Ltd.
- Comparative Example 1 Implemented except using anti-reflective paint (trade name “ELCOM P-5062”, hollow silica fine particle content, solid content concentration 3 mass%, manufactured by JGC Catalysts & Chemicals, Inc.) instead of surface-modified nanodiamond-containing antireflective paint In the same manner as in Examples 1 to 3, a hard coat PET film with an antireflection layer of Comparative Example 1 was produced.
- anti-reflective paint trade name “ELCOM P-5062”, hollow silica fine particle content, solid content concentration 3 mass%, manufactured by JGC Catalysts & Chemicals, Inc.
- Comparative Example 2 An antireflection paint (the concentration of nanodiamond derived from the ND dispersion S3 is about 0.06% by mass) in the same manner as in Example 3 except that the above ND dispersion S3 was used instead of the ND dispersion S2.
- a hard coat PET film with an antireflection layer of Comparative Example 2 was produced in the same manner as in Example 3 except that this antireflection paint was used.
- Example 4 The supernatant liquid collected after allowing the ND dispersion S1 to stand for a whole day and night is dropped into a mixed solvent of 16 ml of toluene and 4 ml of hexane (total amount of dripping 10 ml), and the mixed solvent after the dropping is subjected to a centrifugal separation treatment (centrifugal force). A solid content (surface-modified nanodiamond particles) that had been precipitated by 20,000 ⁇ g and centrifugation time of 10 minutes was recovered.
- Tetrahydrofuran (THF) is added to the solid content thus recovered to prepare a THF solution (solid content concentration of 3% by mass) of surface-modified nanodiamond, and the ultrasonic treatment apparatus (trade name “ASU-10” is used for the solution.
- the product was subjected to ultrasonic treatment for 10 minutes.
- the THF solution after the ultrasonic treatment (containing the surface-modified nanodiamond derived from the ND dispersion S1 and the solid content concentration is 3% by mass), and the polyfunctional acrylate mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate (Trade name “PETIA”, acid value 10, hydroxyl value 100, manufactured by Daicel Ornex Co., Ltd.) in a light-shielding bottle at a quantitative ratio such that the solid content of the THF solution is 40 parts by mass with respect to 60 parts by mass of the polyfunctional acrylate mixture.
- PETA pentaerythritol triacrylate
- a photopolymerization initiator (trade name “Irgacure 184”, manufactured by BASF) with respect to a total of 100 parts by weight, and put into a light-shielding bottle for 1 hour using a shaker. Mixing was performed. Thus, a coating material for forming a refractive index adjusting film in which the surface-modified nanodiamond derived from the ND dispersion S1 is dispersed was prepared. Next, a coating film is formed on the hard coat layer of the hard coat PET film by casting the coating material for forming the refractive index adjusting film using a wire bar, and then a dryer at 80 ° C. for 1 minute.
- a photopolymerization initiator trade name “Irgacure 184”, manufactured by BASF
- UV irradiation device (trade name “ECS-4011GX”, the light source is a high-pressure mercury lamp, manufactured by iGraphics Co., Ltd.), UV light is applied to the coating film on the hard coat PET film in a nitrogen atmosphere. Irradiated. In this ultraviolet irradiation, the light source output was 4 kW, and the conveyance speed of the conveyor for conveying the irradiation object was 2 m / min.
- the hard coat PET film with a refractive index adjusting film of Example 4 was produced as described above.
- Example 5 Regarding the quantitative ratio between the polyfunctional acrylate mixture (trade name “PETIA”, manufactured by Daicel Ornex Co., Ltd.) and the THF solution (containing the surface-modified nanodiamond derived from the ND dispersion S1 and having a solid content concentration of 3 mass%)
- PET film with a refractive index adjusting film of Example 5 was produced in the same manner as in Example 4 except that the solid content of the THF solution was 60 parts by mass with respect to 40 parts by mass of the polyfunctional acrylate mixture.
- Example 3 A THF solution (containing nanodiamond derived from the ND dispersion S3 and containing 3% by mass of the solid content in the same manner as in Example 4 except that the above ND dispersion S3 was used instead of the ND dispersion S1.
- a hard coat PET film with a refractive index adjusting film of Comparative Example 3 was produced in the same manner as in Example 4 except that this THF solution was used.
- Example 6 The supernatant liquid collected after allowing the ND dispersion S1 to stand for a whole day and night is dropped into a mixed solvent of 16 ml of toluene and 4 ml of hexane (total amount of dripping 10 ml), and the mixed solvent after the dropping is subjected to a centrifugal separation treatment (centrifugal force). A solid content (surface-modified nanodiamond particles) that had been precipitated by 20,000 ⁇ g and centrifugation time of 10 minutes was recovered.
- Tetrahydrofuran (THF) is added to the solid content thus recovered to prepare a THF solution (solid content concentration of 3% by mass) of surface-modified nanodiamond, and the ultrasonic treatment apparatus (trade name “ASU-10” is used for the solution.
- the product was subjected to ultrasonic treatment for 10 minutes.
- the THF solution after the ultrasonic treatment (containing the surface-modified nanodiamond derived from the ND dispersion S1 and the solid content concentration is 3% by mass), and the polyfunctional acrylate mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate (Trade name “PETIA”, acid value 10, hydroxyl value 100, manufactured by Daicel Ornex Co., Ltd.) is contained in an amount ratio such that the solid content of the THF solution is 1 part by mass with respect to 100 parts by mass of the polyfunctional acrylate mixture.
- PETA pentaerythritol triacrylate
- a mixture containing 60 parts by mass of tetrahydrofuran and 2 parts by mass of a photopolymerization initiator (trade name “Irgacure 184”, manufactured by BASF) was mixed for 1 hour using a shaker.
- a hard coat forming coating material in which the surface-modified nanodiamond derived from the ND dispersion S1 is dispersed was prepared.
- a coating film was formed by casting the hard coat forming coating material on a 75 ⁇ m thick easy-adhesive PET film (trade name “A-4300”, manufactured by Toyobo Co., Ltd.) using a wire bar.
- the said coating film was dried using the drier for 1 minute at 80 degreeC (The thickness of the coating film after drying is 5 micrometers).
- a UV irradiation device (trade name “ECS-4011GX”, the light source is a high-pressure mercury lamp, manufactured by Eye Graphics Co., Ltd.), the coating film on the PET film was irradiated with UV light in a nitrogen atmosphere.
- the light source output was 4 kW, and the conveyance speed of the conveyor for conveying the irradiation object was 4 m / min.
- the hard coat PET film of Example 6 was produced as described above.
- Example 7 A THF solution (containing nanodiamond derived from the ND dispersion S2 and containing 3% by mass of the solid content) in the same manner as in Example 6 except that the above ND dispersion S2 was used instead of the ND dispersion S1.
- the hard coat PET film of Example 7 was produced in the same manner as in Example 6 except that this THF solution was used.
- Comparative Example 5 A hard-coated PET film of Comparative Example 5 was produced in the same manner as in Example 6 except that the surface-modified nanodiamond-containing THF solution was not used.
- the median diameter (particle size D50) relating to the nanodiamond particles contained in the nanodiamond dispersion is determined using a dynamic light scattering method (non-contact) using an apparatus (trade name “Zetasizer Nano ZS”) manufactured by Spectris. It is a value measured by the backscattering method.
- the nanodiamond dispersion used for the measurement was prepared so that the nanodiamond concentration was 0.2 to 2.0 mass%, and then subjected to ultrasonic irradiation with an ultrasonic cleaner.
- This dry decomposition was performed in three stages under the conditions of 450 ° C. for 1 hour, followed by 550 ° C. for 1 hour, and then 650 ° C. for 1 hour. After such dry decomposition, the residue in the magnetic crucible was evaporated to dryness by adding 0.5 ml of concentrated sulfuric acid to the magnetic crucible. The obtained dried product was finally dissolved in 20 ml of ultrapure water. In this way, an analytical sample was prepared.
- This analysis sample was subjected to ICP emission spectroscopic analysis using an ICP emission spectroscopic analyzer (trade name “CIROS120”, manufactured by Rigaku Corporation).
- the analysis sample was prepared so that the lower limit of detection of this analysis was 50 mass ppm.
- a mixed standard solution XSTC-22 manufactured by SPEX and an atomic absorption standard solution Zr1000 manufactured by Kanto Chemical Co. were used as a standard solution for the calibration curve.
- a sulfuric acid aqueous solution having the same concentration as the sulfuric acid concentration of the analysis sample The solution was diluted appropriately and used.
- the measured value obtained by operating and analyzing in the same manner with an empty crucible was subtracted from the measured value of the nanodiamond dispersion sample to be measured to obtain the zirconium (Zr) content in the sample. .
- haze (%) was measured using a haze measuring apparatus (trade name: “NDH-5000W”, manufactured by Nippon Denshoku Industries Co., Ltd.). The haze measurement was performed according to JIS K 7136. The results are listed in Tables 1-3.
- ⁇ Refractive index> The refractive index of each of the films of Examples 4 and 5 and Comparative Example 3 was measured using a refractive index measuring device (trade name: “NDH-5000W”, manufactured by Nippon Denshoku Industries Co., Ltd.). The refractive index was measured according to JIS K7142. The results are listed in Table 2.
- ⁇ Abrasion resistance> A rubbing test was performed on the coating surface of each of the films of Examples 1 to 3, 6, 7 and Comparative Examples 1, 2, 4 to 6 using a rubbing tester.
- the test environment is 23 ° C. and 50% RH
- the rubbing material used is steel wool # 0000 (manufactured by Nippon Steel Wool Co., Ltd.)
- the moving distance of the rubbing material on the test object surface is 10 cm.
- the load of the rubbing material on the test target surface is 200 g (Examples 1 to 3 and Comparative Examples 1 and 2) or 2000 g (Examples 6 and 7 and Comparative Examples 4 to 6).
- the number of times the material is reciprocated is 50 times (Examples 1 to 3 and Comparative Examples 1 and 2) or 1000 times (Examples 6 and 7 and Comparative Examples 4 to 6).
- the back surface of each film after the rubbing operation was painted with black magic, and then the degree of scratching on the rubbing portion was visually observed using reflected light. And if it is carefully observed, it is evaluated as excellent ( ⁇ ) when no scratch is confirmed, and if it is carefully observed up to 5 scratches is evaluated as good ( ⁇ ), there is clearly scratch The case where it turned out was evaluated as bad (x).
- Tables 1 and 3 The results are listed in Tables 1 and 3.
- the refractive index adjusting film is more than the film of Comparative Example 3 in which the surface-modified nanodiamond is not dispersed in the refractive index adjusting film.
- the haze was significantly low and the transparency was excellent.
- the film of Comparative Example 5 in which the hard diamond is not dispersed in the hard coat and the comparative example in which the surface-modified nanodiamond is not dispersed in the hard coat Examples 6 and 7 in which surface-modified nanodiamond (nanodiamond with silane coupling agent) was dispersed in the hard coat showed higher scratch resistance than the films of 4 and 6. Further, the films of Examples 6 and 7 had significantly lower haze and excellent transparency than the films of Comparative Examples 4 and 6.
- [Appendix 4] The curable resin composition according to Appendix 1 or 2, wherein the surface-modified nanodiamond has a median diameter of 30 nm or less.
- [Appendix 5] The curable resin composition according to Appendix 1 or 2, wherein the surface-modified nanodiamond has a median diameter of 20 nm or less.
- [Appendix 6] The curable resin composition according to any one of Appendixes 1 to 5, wherein the organic chain of the silane coupling agent is propyl acrylate and / or propyl methacrylate.
- [Appendix 7] The curable resin composition according to any one of Appendixes 1 to 6, wherein the curable resin component has a (meth) acryloyl group.
- the curable resin component includes pentaerythritol triacrylate, pentaerythritol tetraacrylate, an oligomer of pentaerythritol triacrylate, an oligomer of pentaerythritol tetraacrylate, and an oligomer of pentaerythritol triacrylate and pentaerythritol tetraacrylate.
- [Appendix 10] The curable resin composition according to any one of Appendices 1 to 8, wherein a ratio of the curable resin component in the solid content is 40% by mass or more.
- [Supplementary Note 11] The curable resin composition according to any one of Supplementary notes 1 to 8, wherein a ratio of the curable resin component in the contained solid content is 55% by mass or more.
- [Appendix 12] The curable resin composition according to any one of Appendices 1 to 8, wherein a ratio of the curable resin component in the solid content is 60% by mass or more.
- [Supplementary Note 13] The curable resin composition according to any one of Supplementary notes 1 to 12, wherein a ratio of the curable resin component in the solid content is 99.9% by mass or less.
- [Appendix 18] The curable resin composition according to any one of Appendixes 1 to 17, further containing hollow silica particles.
- [Appendix 19] The curable resin composition according to Appendix 18, wherein the hollow silica particles have a particle size of 1 nm or more.
- [Appendix 20] The curable resin composition according to Appendix 18 or 19, wherein the hollow silica particles have a particle size of 1000 nm or less.
- [Appendix 21] The curable resin composition according to Appendix 18 or 19, wherein the hollow silica particles have a particle size of 500 nm or less.
- [Appendix 22] The curable resin composition according to Appendix 18 or 19, wherein the hollow silica particles have a particle size of 300 nm or less.
- [Appendix 23] The curable resin composition according to any one of Appendixes 18 to 22, wherein the content of the hollow silica particles is 0.5 mass% or more.
- [Appendix 24] The curable resin composition according to any one of Appendixes 18 to 22, wherein the content of the hollow silica particles is 1% by mass or more.
- [Appendix 25] The curable resin composition according to any one of Appendices 18 to 22, wherein the content ratio of the hollow silica particles is 2% by mass or more.
- [Appendix 26] The curable resin composition according to any one of Appendices 18 to 25, wherein the content of the hollow silica particles is 90% by mass or less.
- [Appendix 27] The curable resin composition according to any one of Appendixes 18 to 25, wherein the content of the hollow silica particles is 80% by mass or less.
- [Appendix 28] The curable resin composition according to any one of Appendixes 18 to 25, wherein the content of the hollow silica particles is 60% by mass or less.
- [Appendix 29] An optical member having a cured product of the curable resin composition according to any one of Appendixes 1 to 28 in at least a part of the light transmission region.
- [Supplementary note 30] The optical member according to supplementary note 29, including a laminated structure portion including a base material and the cured product, wherein the haze of the laminated structure portion is 2.0% or less.
- [Supplementary note 31] The optical member according to supplementary note 29, including a laminated structure portion including a base material and the cured product, wherein the haze of the laminated structure portion is 1.0% or less.
- X resin composition (curable resin composition) X ′ cured resin film Y optical member 10 curable resin component 20 surface modified nanodiamond 21 ND particle (nanodiamond particle) 22 Silane coupling agent 30 Dispersion medium
Abstract
Description
以下のような生成工程、精製工程、pH調整工程、乾燥工程、および修飾工程を経て、表面修飾ナノダイヤモンド分散液ないし表面修飾ナノダイヤモンドを作製した。
修飾工程で用いたシランカップリング剤を、アクリル酸3-(トリメトキシシリル)プロピルに代えてメタクリル酸3-(トリメトキシシリル)プロピル(東京化成工業株式会社製)1gとした以外は、ND分散液S1の作製に関して上述したのと同様の一連の工程(生成工程,精製工程,pH調整工程,乾燥工程,修飾工程)を経て、別の表面修飾ナノダイヤモンド分散液(ND分散液S2)ないし表面修飾ナノダイヤモンドを作製した。この表面修飾ナノダイヤモンドについて、8時間の修飾処理後の粒径D50(メディアン径)を後記のように動的光散乱法によって測定したところ、19nmであった。また、ND分散液S2中の表面修飾ナノダイヤモンドについて、ND分散液S1中の表面修飾ナノダイヤモンドと同様にしてZr含量を測定したところ、7.5質量%であった。
修飾工程でジルコニアビーズを使用しなかった以外は、ND分散液S1の作製に関して上述したのと同様の一連の工程(生成工程,精製工程,pH調整工程,乾燥工程,修飾工程)を経て、別のナノダイヤモンド分散液(ND分散液S3)を作製した。修飾工程において、超音波処理に付された混合溶液(ナノダイヤモンド凝着体およびシランカップリング剤を含有する)は、8時間の超音波処理を経ても当初の灰濁色のままであり、当該混合溶液中には沈降物が存在していた。したがって、ND分散液S3に含有されるナノダイヤモンドにはシランカップリング剤が結合していないと考えられる。前記の沈降物について、乾燥した後に後記のICP発光分光分析法によってZr含量を測定したところ、0.01質量%未満であった。
次のようにして、表面にハードコートを有するPETフィルムを作製した。具体的には、まず、ウレタンアクリレート(商品名「KRM8200」,ダイセルオルネクス株式会社製)30質量部と、メチルエチルケトン70質量部と、光重合開始剤(商品名「イルガキュア184(Irgacure 184)」,BASF製)2質量部とを、遮光瓶に入れて混合し、ハードコート形成用塗料を調製した。次に、厚さ75μmの易接着PETフィルム(商品名「A-4300」,東洋紡株式会社製)上に、ワイヤーバーを使用して当該ハードコート形成用塗料を流延して塗膜を形成した後、80℃で1分間、乾燥機を使用して当該塗膜を乾燥させた(乾燥後の塗膜の厚さは5μm)。次に、紫外線照射装置(商品名「ECS-4011GX」,光源は高圧水銀ランプ,アイグラフィックス株式会社製)を使用して、窒素雰囲気下において、PETフィルム上の塗膜に紫外線を照射した。この紫外線照射においては、光源出力を4kWとし、照射対象物を搬送するコンベアの搬送速度を4m/分とした。以上のようにして、ハードコートPETフィルムを作製した。
上記のND分散液S1を一昼夜静置した後に採取した上清液を、トルエン16mlとヘキサン4mlとの混合溶媒に滴下し(総滴下量10ml)、滴下後の混合溶媒を遠心分離処理(遠心力20000×g,遠心時間10分間)に付して沈降した固形分(表面修飾ナノダイヤモンド粒子)を回収した。このようにして回収した固形分にテトラヒドロフラン(THF)を加えて表面修飾ナノダイヤモンドのTHF溶液(固形分濃度3質量%)を調製し、当該溶液について、超音波処理装置(商品名「ASU-10」,アズワン株式会社製)を使用して10分間の超音波処理を行った。この超音波処理後のTHF溶液中の表面修飾ナノダイヤモンドについて、粒径D50(メディアン径)を後記のように動的光散乱法によって測定したところ、17nmであった。一方、この超音波処理後のTHF溶液(ND分散液S1に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)と、反射防止塗料(商品名「ELCOM P-5062」,中空シリカ微粒子含有,固形分濃度3質量%,日揮触媒化成株式会社製)とを、反射防止塗料の固形分100質量部に対してTHF溶液の固形分が2質量部となる量比で遮光瓶に投入し、振とう機を使用して1時間の混合を行った。このようにして、ND分散液S1に由来する表面修飾ナノダイヤモンドの分散する反射防止塗料(表面修飾ナノダイヤモンド濃度は約0.06質量%)を調製した。次に、上記のハードコートPETフィルムのハードコート層上に、ワイヤーバーを使用して当該反射防止塗料を流延して塗膜を形成した後、80℃で1分間、乾燥機を使用して当該塗膜を乾燥させた(乾燥後の塗膜の厚さは100nm)。次に、紫外線照射装置(商品名「ECS-4011GX」,光源は高圧水銀ランプ,アイグラフィックス株式会社製)を使用して、窒素雰囲気下において、ハードコートPETフィルム上の前記塗膜に紫外線を照射した。この紫外線照射においては、光源出力を4kWとし、照射対象物を搬送するコンベアの搬送速度を2m/分とした。以上のようにして、実施例1の反射防止層付ハードコートPETフィルムを作製した。
反射防止塗料(商品名「ELCOM P-5062」,日揮触媒化成株式会社製)とTHF溶液(ND分散液S1に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)との量比に関し、反射防止塗料の固形分100質量部に対してTHF溶液の固形分を2質量部に代えて5質量部としたこと以外は実施例1と同様にして、反射防止塗料(表面修飾ナノダイヤモンド濃度は約0.15質量%)を調製し、この反射防止塗料を用いたこと以外は実施例1と同様にして、実施例2の反射防止層付ハードコートPETフィルムを作製した。
上記のND分散液S2を一昼夜静置した後に採取した上清液を、トルエン16mlとヘキサン4mlとの混合溶媒に滴下し(総滴下量10ml)、滴下後の混合溶媒を遠心分離処理(遠心力20000×g,遠心時間10分間)に付して沈降した固形分(表面修飾ナノダイヤモンド粒子)を回収した。このようにして回収した固形分にテトラヒドロフラン(THF)を加えて表面修飾ナノダイヤモンドのTHF溶液(固形分濃度3質量%)を調製し、当該溶液について、超音波処理装置(商品名「ASU-10」,アズワン株式会社製)を使用して10分間の超音波処理を行った。この超音波処理後のTHF溶液(ND分散液S2に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)と、反射防止塗料(商品名「ELCOM P-5062」,中空シリカ微粒子含有,固形分濃度3質量%,日揮触媒化成株式会社製)とを、反射防止塗料の固形分100質量部に対してTHF溶液の固形分が5質量部となる量比で遮光瓶に投入し、振とう機を使用して1時間の混合を行った。このようにして、ND分散液S2に由来する表面修飾ナノダイヤモンドの分散する反射防止塗料(表面修飾ナノダイヤモンド濃度は約0.15質量%)を調製した。次に、上記のハードコートPETフィルムのハードコート層上に、ワイヤーバーを使用して当該反射防止塗料を流延して塗膜を形成した後、80℃で1分間、乾燥機を使用して当該塗膜を乾燥させた(乾燥後の塗膜の厚さは100nm)。次に、紫外線照射装置(商品名「ECS-4011GX」,光源は高圧水銀ランプ,アイグラフィックス株式会社製)を使用して、窒素雰囲気下において、ハードコートPETフィルム上の前記塗膜に紫外線を照射した。この紫外線照射においては、光源出力を4kWとし、照射対象物を搬送するコンベアの搬送速度を2m/分とした。以上のようにして、実施例3の反射防止層付ハードコートPETフィルムを作製した。
表面修飾ナノダイヤモンド含有反射防止塗料に代えて反射防止塗料(商品名「ELCOM P-5062」,中空シリカ微粒子含有,固形分濃度3質量%,日揮触媒化成株式会社製)を用いたこと以外は実施例1~3と同様にして、比較例1の反射防止層付ハードコートPETフィルムを作製した。
ND分散液S2の代わりに上記のND分散液S3を用いたこと以外は実施例3と同様にして、反射防止塗料(ND分散液S3に由来するナノダイヤモンドの濃度は約0.06質量%)を調製し、この反射防止塗料を用いたこと以外は実施例3と同様にして、比較例2の反射防止層付ハードコートPETフィルムを作製した。
上記のND分散液S1を一昼夜静置した後に採取した上清液を、トルエン16mlとヘキサン4mlとの混合溶媒に滴下し(総滴下量10ml)、滴下後の混合溶媒を遠心分離処理(遠心力20000×g,遠心時間10分間)に付して沈降した固形分(表面修飾ナノダイヤモンド粒子)を回収した。このようにして回収した固形分にテトラヒドロフラン(THF)を加えて表面修飾ナノダイヤモンドのTHF溶液(固形分濃度3質量%)を調製し、当該溶液について、超音波処理装置(商品名「ASU-10」,アズワン株式会社製)を使用して10分間の超音波処理を行った。この超音波処理後のTHF溶液(ND分散液S1に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)、および、ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートとの多官能アクリレート混合物(商品名「PETIA」,酸価10,水酸基価100,ダイセルオルネクス株式会社製)を、多官能アクリレート混合物60質量部に対してTHF溶液の固形分が40質量部となる量比で遮光瓶に投入し、これらの合計100質量部に対して2質量部の光重合開始剤(商品名「イルガキュア184」,BASF製)を更に遮光瓶に投入し、振とう機を使用して1時間の混合を行った。このようにして、ND分散液S1に由来する表面修飾ナノダイヤモンドの分散する屈折率調整膜形成用の塗料を調製した。次に、上記のハードコートPETフィルムのハードコート層上に、ワイヤーバーを使用して当該屈折率調整膜形成用塗料を流延して塗膜を形成した後、80℃で1分間、乾燥機を使用して当該塗膜を乾燥させた(乾燥後の塗膜の厚さは200nm)。次に、紫外線照射装置(商品名「ECS-4011GX」,光源は高圧水銀ランプ,アイグラフィックス株式会社製)を使用して、窒素雰囲気下において、ハードコートPETフィルム上の前記塗膜に紫外線を照射した。この紫外線照射においては、光源出力を4kWとし、照射対象物を搬送するコンベアの搬送速度を2m/分とした。以上のようにして、実施例4の屈折率調整膜付ハードコートPETフィルムを作製した。
多官能アクリレート混合物(商品名「PETIA」,ダイセルオルネクス株式会社製)とTHF溶液(ND分散液S1に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)との量比に関し、多官能アクリレート混合物40質量部に対してTHF溶液の固形分を60質量部としたこと以外は実施例4と同様にして、実施例5の屈折率調整膜付ハードコートPETフィルムを作製した。
ND分散液S1の代わりに上記のND分散液S3を用いたこと以外は実施例4と同様にして、THF溶液(ND分散液S3に由来するナノダイヤモンドを含有して固形分濃度は3質量%)を調製し、このTHF溶液を用いたこと以外は実施例4と同様にして、比較例3の屈折率調整膜付ハードコートPETフィルムを作製した。
上記のND分散液S1を一昼夜静置した後に採取した上清液を、トルエン16mlとヘキサン4mlとの混合溶媒に滴下し(総滴下量10ml)、滴下後の混合溶媒を遠心分離処理(遠心力20000×g,遠心時間10分間)に付して沈降した固形分(表面修飾ナノダイヤモンド粒子)を回収した。このようにして回収した固形分にテトラヒドロフラン(THF)を加えて表面修飾ナノダイヤモンドのTHF溶液(固形分濃度3質量%)を調製し、当該溶液について、超音波処理装置(商品名「ASU-10」,アズワン株式会社製)を使用して10分間の超音波処理を行った。この超音波処理後のTHF溶液(ND分散液S1に由来する表面修飾ナノダイヤモンドを含有して固形分濃度は3質量%)、および、ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートとの多官能アクリレート混合物(商品名「PETIA」,酸価10,水酸基価100,ダイセルオルネクス株式会社製)を、多官能アクリレート混合物100質量部に対してTHF溶液の固形分が1質量部となる量比で含有し、更にテトラヒドロフラン60質量部と光重合開始剤(商品名「イルガキュア184」,BASF製)2質量部とを含有する混合物について、振とう機を使用して1時間の混合を行った。このようにして、ND分散液S1に由来する表面修飾ナノダイヤモンドの分散するハードコート形成用塗料を調製した。次に、厚さ75μmの易接着PETフィルム(商品名「A-4300」,東洋紡株式会社製)上に、ワイヤーバーを使用して当該ハードコート形成用塗料を流延して塗膜を形成した後、80℃で1分間、乾燥機を使用して当該塗膜を乾燥させた(乾燥後の塗膜の厚さは5μm)。次に、紫外線照射装置(商品名「ECS-4011GX」,光源は高圧水銀ランプ,アイグラフィックス株式会社製)を使用して、窒素雰囲気下において、PETフィルム上の塗膜に紫外線を照射した。この紫外線照射においては、光源出力を4kWとし、照射対象物を搬送するコンベアの搬送速度を4m/分とした。以上のようにして、実施例6のハードコートPETフィルムを作製した。
ND分散液S1の代わりに上記のND分散液S2を用いたこと以外は実施例6と同様にして、THF溶液(ND分散液S2に由来するナノダイヤモンドを含有して固形分濃度は3質量%)を調製し、このTHF溶液を用いたこと以外は実施例6と同様にして、実施例7のハードコートPETフィルムを作製した。
ND分散液S1の代わりに上記のND分散液S3を用いたこと以外は実施例6と同様にして、THF溶液(ND分散液S3に由来するナノダイヤモンドを含有して固形分濃度は3質量%)を調製し、このTHF溶液を用いたこと以外は実施例6と同様にして、比較例4のハードコートPETフィルムを作製した。
表面修飾ナノダイヤモンド含有THF溶液を用いなかったこと以外は実施例6と同様にして、比較例5のハードコートPETフィルムを作製した。
ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートとの多官能アクリレート混合物(商品名「PETIA」,酸価10,水酸基価100,ダイセルオルネクス株式会社製)40質量部の代わりに多官能アクリレートとしてジペンタエリスリトールヘキサアクリレート(商品名「DPHA」,酸価0.2,水酸基価5,ダイセルオルネクス株式会社製)40質量部を用いたこと以外は実施例6と同様にして、比較例6のハードコートPETフィルムを作製した。
ナノダイヤモンド分散液に含まれるナノダイヤモンド粒子に関する上記のメディアン径(粒径D50)は、スペクトリス社製の装置(商品名「ゼータサイザー ナノZS」)を使用して、動的光散乱法(非接触後方散乱法)によって測定した値である。測定に供されたナノダイヤモンド分散液は、ナノダイヤモンド濃度が0.2~2.0質量%となるように調製した後に、超音波洗浄機による超音波照射を経たものである。
ナノダイヤモンド分散液から加熱によって溶媒を蒸発させた後に残留する乾燥物(粉体)100mgについて、磁性るつぼに入れた状態で電気炉内にて乾式分解を行った。この乾式分解は、450℃で1時間の条件、これに続く550℃で1時間の条件、及びこれに続く650℃で1時間の条件にて、3段階で行った。このような乾式分解の後、磁性るつぼ内の残留物について、磁性るつぼに濃硫酸0.5mlを加えて蒸発乾固させた。そして、得られた乾固物を最終的に20mlの超純水に溶解させた。このようにして分析サンプルを調製した。この分析サンプルを、ICP発光分光分析装置(商品名「CIROS120」,リガク社製)によるICP発光分光分析に供した。本分析の検出下限値が50質量ppmとなるように前記分析サンプルを調製した。また、本分析では、検量線用標準溶液として、SPEX社製の混合標準溶液XSTC-22、および、関東化学社製の原子吸光用標準溶液Zr1000を、分析サンプルの硫酸濃度と同濃度の硫酸水溶液にて適宜希釈調製して用いた。そして、本分析では、空のるつぼで同様に操作および分析して得られた測定値を、測定対象たるナノダイヤモンド分散液試料についての測定値から差し引き、試料中のジルコニウム(Zr)含量を求めた。
実施例1~7および比較例1~6の各フィルムについて、全光線透過率測定装置(商品名:「NDH-5000W」,日本電色工業株式会社製)を使用して、全光線透過率(%)を測定した。本測定は、JIS K 7105に準拠して行った。その結果を表1~3に掲げる。
実施例1~7および比較例1~6の各フィルムについて、ヘーズ測定装置(商品名:「NDH-5000W」,日本電色工業社製)を使用してヘーズ(%)を測定した。ヘーズの測定は、JIS K 7136に準拠して行った。その結果を表1~3に掲げる。
実施例4,5および比較例3の各フィルムについて、屈折率測定装置(商品名:「NDH-5000W」,日本電色工業社製)を使用して屈折率を測定した。屈折率の測定は、JIS K 7142に準拠して行った。その結果を表2に掲げる。
実施例1~3,6,7および比較例1,2,4~6の各フィルムの塗膜形成面について、ラビングテスターを使用して、こすり試験を行った。本こすり試験において、試験環境は23℃および50%RHであり、使用したこすり材はスチールウール#0000(日本スチールウール株式会社製)であり、試験対象面上のこすり材の移動距離は10cmであり、試験対象面に対するこすり材の荷重は200g(実施例1~3と比較例1,2)または2000g(実施例6,7と比較例4~6)であり、試験対象面に対してこすり材を往復動させる回数は50回(実施例1~3と比較例1,2)または1000回(実施例6,7と比較例4~6)である。本こすり試験においては、こすり作業を終えた各フィルムの裏面を黒マジックで塗りつぶした後、反射光を利用して、こすり部分の擦傷の程度を目視で観察した。そして、注意深く観察しても全く傷が確認されなかった場合を優(◎)と評価し、注意深く観察すると傷が5本まで確認された場合を良(○)と評価し、明らかに傷があることが分かった場合を不良(×)と評価した。その結果を表1,3に掲げる。
反射防止層付ハードコートPETフィルムたる実施例1~3および比較例1,2のフィルムにおいて、反射防止層にナノダイヤモンドの分散していない比較例1のフィルムおよび反射防止層に表面修飾ナノダイヤモンドの分散していない比較例2のフィルムよりも、反射防止層に表面修飾ナノダイヤモンド(シランカップリング剤付ナノダイヤモンド)の分散している実施例1~3は、高い耐擦傷性を示した。また、実施例1~3のフィルムは、比較例2のフィルムよりも、ヘーズが有意に低く、透明性に優れていた。
ナノダイヤモンド粒子、および、(メタ)アクリロイル基を含む有機鎖を有し且つ前記ナノダイヤモンド粒子に結合している、シランカップリング剤を含む、表面修飾ナノダイヤモンドと、
有機溶媒と、を含有する、硬化性樹脂組成物。
〔付記2〕前記ナノダイヤモンド粒子は、爆轟法ナノダイヤモンド粒子である、付記1に記載の硬化性樹脂組成物。
〔付記3〕前記表面修飾ナノダイヤモンドのメディアン径は50nm以下である、付記1または2に記載の硬化性樹脂組成物。
〔付記4〕前記表面修飾ナノダイヤモンドのメディアン径は30nm以下である、付記1または2に記載の硬化性樹脂組成物。
〔付記5〕前記表面修飾ナノダイヤモンドのメディアン径は20nm以下である、付記1または2に記載の硬化性樹脂組成物。
〔付記6〕前記シランカップリング剤の前記有機鎖は、アクリル酸プロピルおよび/またはメタクリル酸プロピルである、付記1から5のいずれか一つに記載の硬化性樹脂組成物。
〔付記7〕前記硬化性樹脂成分は、(メタ)アクリロイル基を有する、付記1から6のいずれか一つに記載の硬化性樹脂組成物。
〔付記8〕前記硬化性樹脂成分は、ペンタエリスリトールトリアクリレート、ペンタエリスリトールテトラアクリレート、ペンタエリスリトールトリアクリレートのオリゴマー、ペンタエリスリトールテトラアクリレートのオリゴマー、および、ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートとのオリゴマーからなる群より選択される少なくとも一種である、付記1から7のいずれか一つに記載の硬化性樹脂組成物。
〔付記9〕含有固形分における前記硬化性樹脂成分の割合が30質量%以上である、付記1から8のいずれか一つに記載の硬化性樹脂組成物。
〔付記10〕含有固形分における前記硬化性樹脂成分の割合が40質量%以上である、付記1から8のいずれか一つに記載の硬化性樹脂組成物。
〔付記11〕含有固形分における前記硬化性樹脂成分の割合が55質量%以上である、付記1から8のいずれか一つに記載の硬化性樹脂組成物。
〔付記12〕含有固形分における前記硬化性樹脂成分の割合が60質量%以上である、付記1から8のいずれか一つに記載の硬化性樹脂組成物。
〔付記13〕含有固形分における前記硬化性樹脂成分の割合が99.9質量%以下である、付記1から12のいずれか一つに記載の硬化性樹脂組成物。
〔付記14〕含有固形分における前記硬化性樹脂成分の割合が99質量%以下である、付記1から12のいずれか一つに記載の硬化性樹脂組成物。
〔付記15〕含有固形分における前記硬化性樹脂成分の割合が95質量%以下である、付記1から12のいずれか一つに記載の硬化性樹脂組成物。
〔付記16〕前記有機溶媒はテトラヒドロフランを含む、付記1から15のいずれか一つに記載の硬化性樹脂組成物。
〔付記17〕前記表面修飾ナノダイヤモンドとの合計含有量における割合が0.01質量%以上のジルコニウムを含有する、付記1から16のいずれか一つに記載の硬化性樹脂組成物。
〔付記18〕中空シリカ粒子を更に含有する、付記1から17のいずれか一つに記載の硬化性樹脂組成物。
〔付記19〕前記中空シリカ粒子の粒子径は1nm以上である、付記18に記載の硬化性樹脂組成物。
〔付記20〕前記中空シリカ粒子の粒子径は1000nm以下である、付記18または19に記載の硬化性樹脂組成物。
〔付記21〕前記中空シリカ粒子の粒子径は500nm以下である、付記18または19に記載の硬化性樹脂組成物。
〔付記22〕前記中空シリカ粒子の粒子径は300nm以下である、付記18または19に記載の硬化性樹脂組成物。
〔付記23〕前記中空シリカ粒子の含有割合が0.5質量%以上である、付記18から22のいずれか一つに記載の硬化性樹脂組成物。
〔付記24〕前記中空シリカ粒子の含有割合が1質量%以上である、付記18から22のいずれか一つに記載の硬化性樹脂組成物。
〔付記25〕前記中空シリカ粒子の含有割合が2質量%以上である、付記18から22のいずれか一つに記載の硬化性樹脂組成物。
〔付記26〕前記中空シリカ粒子の含有割合が90質量%以下である、付記18から25のいずれか一つに記載の硬化性樹脂組成物。
〔付記27〕前記中空シリカ粒子の含有割合が80質量%以下である、付記18から25のいずれか一つに記載の硬化性樹脂組成物。
〔付記28〕前記中空シリカ粒子の含有割合が60質量%以下である、付記18から25のいずれか一つに記載の硬化性樹脂組成物。
〔付記29〕付記1から28のいずれか一つに記載の硬化性樹脂組成物の硬化物を光透過領域の少なくとも一部に有する、光学部材。
〔付記30〕基材と前記硬化物とを含む積層構造部を有し、当該積層構造部のヘーズは2.0%以下である、付記29に記載の光学部材。
〔付記31〕基材と前記硬化物とを含む積層構造部を有し、当該積層構造部のヘーズは1.0%以下である、付記29に記載の光学部材。
X’ 硬化樹脂膜
Y 光学部材
10 硬化性樹脂成分
20 表面修飾ナノダイヤモンド
21 ND粒子(ナノダイヤモンド粒子)
22 シランカップリング剤
30 分散媒
Claims (13)
- 硬化性樹脂成分と、
ナノダイヤモンド粒子、および、(メタ)アクリロイル基を含む有機鎖を有し且つ前記ナノダイヤモンド粒子に結合している、シランカップリング剤を含む、表面修飾ナノダイヤモンドと、
有機溶媒と、を含有する、硬化性樹脂組成物。 - 前記ナノダイヤモンド粒子は、爆轟法ナノダイヤモンド粒子である、請求項1に記載の硬化性樹脂組成物。
- 前記表面修飾ナノダイヤモンドのメディアン径は50nm以下である、請求項1または2に記載の硬化性樹脂組成物。
- 前記シランカップリング剤の前記有機鎖は、アクリル酸プロピルおよび/またはメタクリル酸プロピルである、請求項1から3のいずれか一つに記載の硬化性樹脂組成物。
- 前記硬化性樹脂成分は、(メタ)アクリロイル基を有する、請求項1から4のいずれか一つに記載の硬化性樹脂組成物。
- 前記硬化性樹脂成分は、ペンタエリスリトールトリアクリレート、ペンタエリスリトールテトラアクリレート、ペンタエリスリトールトリアクリレートのオリゴマー、ペンタエリスリトールテトラアクリレートのオリゴマー、および、ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートとのオリゴマーからなる群より選択される少なくとも一種である、請求項1から5のいずれか一つに記載の硬化性樹脂組成物。
- 含有固形分における前記硬化性樹脂成分の割合が30質量%以上である、請求項1から6のいずれか一つに記載の硬化性樹脂組成物。
- 前記有機溶媒はテトラヒドロフランを含む、請求項1から7のいずれか一つに記載の硬化性樹脂組成物。
- 前記表面修飾ナノダイヤモンドとの合計含有量における割合が0.01質量%以上のジルコニウムを含有する、請求項1から8のいずれか一つに記載の硬化性樹脂組成物。
- 中空シリカ粒子を更に含有する、請求項1から9のいずれか一つに記載の硬化性樹脂組成物。
- 前記中空シリカ粒子の含有割合が0.5質量%以上である、請求項10に記載の硬化性樹脂組成物。
- 請求項1から11のいずれか一つに記載の硬化性樹脂組成物の硬化物を光透過領域の少なくとも一部に有する、光学部材。
- 基材と前記硬化物とを含む積層構造部を有し、当該積層構造部のヘーズは2.0%以下である、請求項12に記載の光学部材。
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CN115947750B (zh) * | 2023-03-14 | 2023-08-18 | 山东东岳有机硅材料股份有限公司 | 羧基化硅烷偶联剂及其制备方法 |
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